Merge "aconfig: throw exception if reading from DeviceConfig fails" into main...

Merge "aconfig: throw exception if reading from DeviceConfig fails" into main am: c20d1155 am: 093793c8 am: 4df1129d

Original change: https://android-review.googlesource.com/c/platform/build/+/2751666



Change-Id: I8bca30ee33e401f94f20fd69ba995309f99ecdc0
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>